A hypothetical file location in jimbo's home
directory would be: /user/j/jimbo/250a/mysound.wav

If you don't know how to edit a .wav file, this is
not mandatory.

If you aren't sure how to edit .wav files on linux,
check out Audacity, (type "audacity" in a terminal, without the
quotes), or choose it from the "Sound and Video" tab of the Main Menu
in your taskbar.

If you want to import audio from an audio CD in
Linux, you can use cdparanoia (typing "cdparanoia" in a terminal,
without the quotes, gives the usage instructions). An example usage
would be:
to extract from track 1, time 0:30.12 to 1:10.00, type (with the
quotes): cdparanoia "1[:30.12]-1[1:10]"